Refrigerator wall



v. P. WARREN REFRIGERATOR WALL March 15; 1927.

Filed Sept. 24, 1924 KRWarrmdam/J I spective view of a portion of Patented Mar. 15,1927, I

VIBGIL P. WARREN, OF ATLANTA, GEORGIA.

nnrnrenaa'ron want.

Application filed September 24, 1924. Serial 110, 739,727.

This invention relates to a wall construction, particularly erators. As is well known, provision. be made for expansion and contraction of refrigerator walls and it is essential that there be no leakage of air between the joints in the walls. I have devised an improved form of joint which will effectually prevent such leakage, the joint having two sliding surfaces which efl'ectuallyprevent leakage.

Fig-1 is a pera refrigerator, the'door of the same being shown in open position to show how the interior appears with my improved walls; 7 Figs. 2 and 3 are cross-sections through the refrigerator walls, showing the same in fully and partially expanded position, respec tively.

The walls are made up of a plurality of relatively narrow strips 1 suitably secured to the frame of the refrigerator to permit relative displacement thereon; Each side of the strip is cut back along one edge to form a tongue 2, and an angular extension 3 at the end of the tongue, the extensions being reversely arranged sliding fit is had of the next strip when the said strips are laid on the refrigerator frame. The tongues overlap but are spaced from each other. Each joint therefore has two extensions cooperating with the flat. surfaces of the Referring to the drawings,

designed for use in refrigmust and of such length that a with the adjacent tongue tongues, thus providing a double seal against leakage of air around the oint. The extensions also cooperate to prevent separation of the joint as will be readily appreciated by reference to the drawings. The interior and exterior of the refrigerator are provided with the improved wall, 40 the walls being spaced apart and filled with suitable insulating material not shown.

What I vclaim is: I I I H A wall including framework, siding strips secured to said framework and having similar slidably connected interlocking joints formed by providing diagonally opposite edges of eachstrip with rabbets of the same width and depth and grooving the face of each rabbet parallel to the sides of said strip similarly to form a lateral tongue on each rabbeted edge of said strip, the groove so formed being substantially wider than the width of said tongue, the strips being secured to said framework with the tongues of each strip in the grooves of the adjacent strips and in'latera'l contact with the tongues of said adjacent strips to allow each tongue to slide laterally, when the strips expand, in contact with the bottom ofthe groove'in the. adjacent strip, and'thereby provide a double seal against air leakage aroundthe joint. 1

In testimony whereof I affix my signature. 7

VIE-GIL P. WARREN. 

